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Finding the Fourth Proportional to 289,404.39, 399,025.17 and 212,689.92

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Solution

The fourth proportional to 289,404.39, 399,025.17 and 212,689.92 is: 293,252.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,404.39 : 399,025.17 = 212,689.92 : x
  2. Step 2: Convert to fraction form
    289,404.39/399,025.17 = 212,689.92/x
  3. Step 3: Cross multiply
    289,404.39x = 399,025.17 × 212,689.92
  4. Step 4: Simplify right side
    289,404.39x = 84,868,631,485.29
  5. Step 5: Solve for x
    x = 84,868,631,485.29/289,404.39
  6. Step 6: Final answer
    x = 293,252.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.